How do I know if a 50mm lens will fit my Durst m670 bw?

Helinophoto

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Hi

I am on the lookout for a 50mm lens for my Durst m670 blacka dn white, but looking at eBay left me no smarter really.

How do I know if the lens will actually fit my enlarger, if the lens is from Nikon or another brand?

Is the lens "mount" som kind of standard on enlargers in general?

I have a 110mm lens on mine now and it works perfectly for 6*6 and 6*7, but not for 35mm negs, the enlargement only goes up to just short of 20cm*30cm.


Need some help on how to get the correct lens, would be a shame to buy something that actually didn't fit =)
 

Rick A

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You need to know what size lensboard you have. Does it accept standard 39mm ltm or 25mm threaded lenses, also is the lensboard threaded or does it require a jamb nut(retaining ring)that screws on from the rear of the board after inserting the lens. I can help you out in either case with a lens, PM me here at Apug if you are interrested.
 
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Helinophoto

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Thank you for your answer =)

I think it just screws in there, I can check the dimensions of the current lens when I get home. (bought the enlarger 2-3 weeks ago and I am not very familiar with the lens stuff, past experience has been with 35mm enlargers only....and that was in 1988 =D ).

Kind regards
 

Steve Smith

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It's fairly common for enlargers of that size to have a 39mm thread. A lot of lenses have the same thread but they also come with a 25mm thread. In this case, an adaptor ring is used: http://www.photographyattic.com/product-1372


Steve.
 

Paul Howell

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You may need a recessed lens board for your 607, my 601 requires a recessed. Do you have the owners manual?
 

paul ron

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Regardless if it is a 25mm and your lens is larger, just file the hole out n use a jamb nut.

.
 

Jerevan

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Most probably the lens is going to fit. The 670 we had in the lab had 39 mm lensboards. I think they (the boards) are relatively common. I have never seen a Nikon 50 with anything else than 39 mm thread, but I know some older Schneiders had 25 mm thread.
 
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